size | 易学教程

How to declare an array with an arbitrary size

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问题 Ok, this is a C programming homework question. But I'm truly stuck. I ask the user to input words, and then I insert the input into an array, but I can't have any control over the number of words the user types. I guess what I'm asking is how do you declare a an array in C without declaring its length and without asking the user what the length should be. I know this has something to do with malloc, but if you could give me some examples of how to do this, I would really appreciate it. 回答1:

PyInstaller very big file size

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问题 I've made simple code editor using wxPython. File size (python files) is 1.3 KB. But when I create executable using PyInstaller, I get 30 MB file ! Is there a way to decrease file size? Btw, I am not importing whole wx library, only components I need (ex from wx import Frame ). Using Linux, Fedora 18 64bit. 回答1: wxPython is a big library so when you create an executable, they tend to end up being between 20 and 30 MB. Also note that Python itself is kind of bulky because Python is an

UIPickerView won't allow changing font name and size via delegate's `attributedTitleForRow…`

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问题 I use the following func to change the font color and font size, the color works but the font name and font size refuse to work. func pickerView(pickerView: UIPickerView, attributedTitleForRow row: Int, forComponent component: Int) -> NSAttributedString? var myTitle = NSAttributedString(string: titleData, attributes: [NSFontAttributeName:UIFont(name: "Arial-BoldMT", size: 45)!, NSForegroundColorAttributeName:UIColor.whiteColor()]) any help? Thx. 回答1: I have a another option may be it helpfull

Node.js: how to limit the HTTP request size and upload file size?

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问题 I'm using Node.js and express. I would like to limit the HTTP request size. Let's say, if someone sends me a HTTP request more than 2 MB then I stop the request right away. I looked at the code and I think if I change the core, I can do it. However, is there a way to set a max_request_size or soemthing like that? It is kind of related to my second question. I'm using express to get an uploaded file from req.files . Is there a way to stop writing the file to the /tmp folder (which is the

Automatically size JPanel inside JFrame

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问题 I have a JPanel subclass on which I add buttons, labels, tables, etc. To show on screen it I use JFrame : MainPanel mainPanel = new MainPanel(); //JPanel subclass JFrame mainFrame = new JFrame(); mainFrame.setTitle("main window title"); mainFrame.getContentPane().add(mainPanel); mainFrame.setLocation(100, 100); mainFrame.pack(); mainFrame.setVisible(true); mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); But when I size the window, size of panel don't change. How to make size of

How to make a javafx button with circle shape of 3xp diameter?

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问题 I want to make a VERY small round button with no text on it. Here is how I tried. Button bt = new Button(); bt.setShape(new Circle(1.5)); bt.setMaxSize(3,3); However,there are two problems: 1.The shape of the button is not perfectly round, but more like an oval. 2. The bt.setMaxSize(1.5,1.5); does not take effect. As i reckon, its diameter is more than 3... How could I make a smaller rounder Button? Help Appreciated. 回答1: Update: on close review of the resultant button, setting the shape like

Java PriorityQueue with fixed size

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问题 I am calculating a large number of possible resulting combinations of an algortihm. To sort this combinations I rate them with a double value und store them in PriorityQueue. Currently, there are about 200k items in that queue which is pretty much memory intesive. Acutally, I only need lets say the best 1000 or 100 of all items in the list. So I just started to ask myself if there is a way to have a priority queue with a fixed size in Java. I should behave like this: Is the item better than

Selecting the size of a System.Drawing.Icon?

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问题 I have a icon which has a few different sizes (16px, 32px, 64px). I am calling ToBitmap() on it, but it is always returning the 32px image. How do I retrieve the 64px one? 回答1: This is a fairly painful limitation in the ResourceManager class. Its GetObject() method doesn't provide a way to pass extra arguments that would allow selecting the returned icon by size. A workaround is to add the icon to the project instead. Use Project + Add Existing Item, select your .ico file. Select the added

Sybase数据类型

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原文地址： http://quqtalk.iteye.com/blog/347852 字段类型描述字段长度及其缺省值 Char(Size) 用于保存定长 (Size) 字节的字符串数据。每行定长（不足部分补为空格）；最大长度为 255 字节，缺省值为每行 1 字节。 Varchar(Size) 用于保存变长的字符串数据。其中最大字节长度由 (Size) 指定。每行长度可变，最大长度为 255 字节。数据长度缺省为 1 Nchar(Size) 多字节字符串。　每行定长（不足部分补为空格）。长度 (Size ）是指字符的个数，最大字节数为 Size*A@@Nchar Size 。 Nvarchar(Size) 可变长，多字节字符串。每行变长。长度 (Size ）是指字符的个数，最大字节数为 Size*A@@Nchar Size 。 Binary(Size) 固定长度的二进制字符串。每行定长（不足部分补为空格）；最大长度为 255 字节，缺省值为每行 1 字节。 Varbinary(Size) 可变长度的长度的二进制字符串。每行长度可变，最大长度为 255 字节。数据长度缺省为 1 Timestamp 用于改变管理的二进制值。字节数为 16 Datetime 保存定长的日期时间数据，范围为 1753 年 1 月 1 日到公元 9999 年 12 月 21 日，精度为

GCC C++ “Hello World” program -> .exe is 500kb big when compiled on Windows. How can I reduce its size?

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问题 I just recently started learning C++ - I am using nuwen's version of MingW on Windows, using NetBeans as an IDE (I have also MSDN AA Version of MSVC 2008, though I don't use it very often). When compiling this simple program: #include <iostream> using namespace std; int dog, cat, bird, fish; void f(int pet) { cout << "pet id number: " << pet << endl; } int main() { int i, j, k; cout << "f(): " << (long)&f << endl; cout << "dog: " << (long)&dog << endl; cout << "cat: " << (long)&cat << endl;